Title :
Advantageous Use of New Dual Rectangular Photomultiplier Tube for Positron CT
Author :
Uchida, H. ; Yamashita, Y. ; Yamashita, T. ; Hayashi, T.
Author_Institution :
Hamamatsu TV Co., Ltd. 1126-1 Ichino-cho Hamamatsu City, Japan
Abstract :
A new dual rectangular photomultiplier tube (PMT) developed for the positron CT is discussed in comparison with the conventional small-diameter PMT. A matching in shape between the scintillator and the PMT is an important factor to obtain good time resolution. The new PMTs have coincidence time resolution less than 3 ns in FWHM coupled to 12 mm (wide) x 24 mm (high) x 24 mm (long) BGO scintillators for 511 keV annihilation ¿-rays while resolution of the conventional small-diameter PMTs is around 5 ns in FWHM.
Keywords :
Cities and towns; Fresnel reflection; Optical coupling; Optical reflection; Photomultipliers; Positrons; Pulse measurements; Spatial resolution; TV; Timing;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1983.4332309
